Water heater



June 23, 1,925. 1,543,449

7 R. R. RUST WATER HEATER Filed Aug. '22. 1922 Zgwvamfoz,

Eat/Fm wffozumg Patented June 23, 1925.

UNITED v s'rATEs PATE ' ROBERT a. river, or NEW You; 11.x.

WATER HEATER.

Application filed August 22, 1922 Serial No. 588,584.

To all whom it may concern;

Be it known that I, ROBERT R liner, a citizen of the United states,residing in the city of New York, county of Queens, and,

State of New York, have invented new and useful Improvements in WaterHeaters, of which the following is a specification, reference being hadto the accompanying drawings, in which Fig. 1 1s a section of myimprovedheater area. My improved apparatus is arranged p so that it maybe assembled readily and is particularly adapted for use in heatingwater in a domestic hot water system. invention also comprises thevarious features which I shall hereinafter describe and claim.

Referring to the drawings, 2 indicates the water heating chamber whichis formed with convoluted shell 3 and is contained in a cylinder 4 whichforms with the outer face of the shell 3 a chamber 5 for the heatingmedium. The chamber 2 has tapped openings 6 and 7, the o ening 6being-the inlet and the opening being the outlet. The upper end of theshell 3 has an annular flange 8 which is machined and engages amachinedface 9 in the opening which oocupies substantially the whole top of thecylinder 4. The machined faces on the member 2 and cylinder 4 arearranged at differential angles, the-angle of the face 8 beingpreferably two degrees and that of the face 9, 2 degrees, so that theface 8 will have a line contact with the face 9 on the cylinder. Thebottom of the cylinder 4 is apertured at 10 for admission of the inletpipe 11 and has a shoulder 12 for a gasket about the aperture 10 toprovide a bearing surface for a nut 13 which engages a thread 14 on theinlet pipe 11 and by which the shell 3 is drawn down so as to draw theface 8 into a tight'cngagement with the differentially tapered face 9 ofthe cylinder 4. The cylinder 4 is provided with tapped open ngs 15 and1G for the inlet and outlet be closed by a plug.

pipes 17 and 18 by which the heating medium is circulated into andthrough the cylinder and around the convolutions of the chamber 2 and isreturned to the source of heat. The cylinder 4 is also provided with anadditional tapped openin 19, which may be used for a connection thesource of heat instead of opening 11 which may then When in use myheater may be heated by hot water circulation or by steam or vapor.

The heating medium enters the cylinder 4 passes throughthe inlet betweenthe cylin voluted wall 3 of the chamber 2 and out the (pipe 17 and thenreturn pipe 18 to the boiler.- The water to be heated enters the chamber2 through the inlet opening 6 and is quickly heated by convection fromthe heat of the water without the wall of the chamber 2 and, rising,asses out through the outlet opening 7. If desired, the inlet and outletmay be connected with a range boiler and will serve as an auxiliarytherefor, or they may be connected with a storage tank connected with adomestic supply system.

NT: OFFICE. 1

er wall 4 and the con-v My invention is of great utility and provides aneflicient and practicable heater in which the convoluted shell enablesthe heating medium to act quickl upon the water to be heated. It is reaily assembled or taken down, constructed as it is of two separate shellsand a minimum number of parts. The use of the differential tapered jointat the top connection between the two shells and a single nut for holdinthe parts in place provides an exceeding y simple and economicalconstruction.

The terms and expressions which I have employed are used as terms ofdescriptionand not of limitation, and I have no intention, in the use ofsuch terms and expressions, of excluding any mechanical equivalents ofthe features shown and described, or portions thereof, but recognizethat various structural modifications are possible within the scope ofthe invention claimed.

What I claim is: .1. A water heater comprisin shell for the water to beheated,

an inner an outer shell arranged about theinner shell and dproium tightengagement, the two shells being free from other connecting parts, saidshells each having an inlet and an outlet.

2. A Water heater comprising an outer shell and an inner shell, theouter shell having an aperture in one end of greater diameter than thebody of the inner shell, the inner shell and the outer.shell havingdifferentially tapered surfaces arranged to be brought into engagementwith each other, and a nut and thread connection for drawing the saidparts into a line engagement.

3. A water heater comprising an outer shell and an inner shell, theouter shell having an aperture in one end of greater diameter than thebody of the inner shell, the inner shell and the outer shell having atcorresponding ends differentially tapered engaging surfaces, the innershell at the opposite end having an extension, a nut engaging saidextension and having a bearing against the outer shell whereby, as thenut draws down on the said extension, the said differential surfaces atthe other end of the device are drawn down into a line engagement.

4. A water heater comprising an outer shell and an inner shell, theouter shell having an aperture in one end of greater diameter than thebody of the inner shell, and the inner shell having convolutions toprovide an extended heating surface, meeting surfaces on said shells,one of said surfaces being inclined at a greater angle to the horizontalthan the otherto compensate for inequalities in said shells, and meansfor drawing said surfaces tightly into engagement.

ROBERT R. RUST.

